Expansible chamber devices – With assembly or disassembly facilitating means
Patent
1985-11-26
1987-10-27
Hershkovitz, Abraham
Expansible chamber devices
With assembly or disassembly facilitating means
92130C, 92138, F01B 2900, F01B 3100, F01B 900
Patent
active
047021500
ABSTRACT:
A spring-return type actuator for valves including a piston cylinder mechanism, a movement conversion-transmission means disposed in the piston cylinder mechanism for converting reciprocation of a piston into a rotary motion of a valve drive shaft, a spring mechanism disposed in series relative to the piston cylinder mechanism, and a plurality of tie rods each including a male member having one end thereof attached to a flange portion of one side wall of the spring mechanism and having an external thread portion, and a female member having one end thereof screwed into a flange portion of the other side wall of the spring mechanism and having an internal thread portion helically meshed with the external thread portion of the male member and having a winglike member attached to the outer periphery thereof for engaging the female member with the outer periphery of the spring box to prevent the female member from rotating, and each tie rod having a length set larger than the free length of a spring when assumed immediately before the leading end of the external thread portion is released from its state kept in mesh with the internal thread portion so as to prevent the one side wall of the spring mechanism from springing out and the spring from bursting out of the spring mechanism.
REFERENCES:
patent: 1952627 (1934-03-01), Karper
patent: 2885769 (1959-05-01), Brown
patent: 3175473 (1965-03-01), Boteler et al.
patent: 3727523 (1973-04-01), Gulick
patent: 4319517 (1982-03-01), McCaleb
patent: 4325218 (1982-04-01), Weiler et al.
patent: 4469016 (1984-09-01), Butler et al.
Hershkovitz Abraham
Kitz Corporation
Williamson Mark A.
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